Code:
2015-05-12 22:21:04+0200 [Protocol,0,192.168.x.y] 2015-05-12 22:21:04,083 WARNING protocol # Failed message: Cannot decode mess,���C��r��M
o���u"���Iu�\03gE9k�2@D8j�f/<A5=�' from 192.168.x.y
It looks like the newer version has some trouble, 4.2.0 is mining again (only own pool).